Abstract
Potatoes, cv. Netted Gem, irrigated at intervals of approximately one week or daily to replace daily evapotranspiration, were cooled by lowvolume sprinkling when air temperature exceeded 26.7 C (80 F). During 3 years when average temperatures for the hottest 2 months of the growing season, were within 1.5 C (2.7 F) of the 69-year average (17.5 C or 63.5 F), yields of potatoes irrigated by frequent low-volume sprinkling were not significantly greater than those of potatoes irrigated weekly. Salt deposits on leaves of plants that were irrigated daily and cooled had no effect on yield. It was concluded that frequent low-volume sprinkling would not be superior to conventional irrigation scheduling for potatoes in southern Alberta.
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